All recordings: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/
Twig Snap — Allan Legemaate (alegemaate)
https://freesound.org/people/alegemaate/sounds/364699/
Source: public HQ MP3 preview, unmodified.
Park ambiences — Thimras
https://opengameart.org/content/park-ambiences
park_ambience_birds.wav and park_ambience_wind.wav: transcoded to AAC for web delivery.